<template>
  <el-container class="home_container">
    <!-- 头部 -->
    <el-header>
      <div class="home_div">
        <img class="home_logo" src="../assets/logo4.png" alt />
        <span>后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 主体 -->
    <el-container>
      <!-- 侧边导航 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
        <el-menu
          background-color="#404040"
          text-color="#fff"
          active-text-color="#409bff"
          :unique-opened="true"
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath"
        >
          <el-submenu :index="item.psId+''" v-for="item in menuList" :key="item.id">
            <template slot="title">
              <i :class="iconsObj[item.psId]"></i>
              <span>{{item.psName}}</span>
            </template>
            <el-menu-item
              :index="'/'+subItem.path"
              v-for="subItem in item.children"
              :key="subItem.id"
              @click="saveNavStatus('/'+subItem.path)"
            >
              <template slot="title">
                <i class="el-icon-menu"></i>
                <span>{{subItem.psName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 内容区 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data () {
    return {
      menuList: [],
      // 菜单按钮
      iconsObj: {
        125: 'iconfont icon-user',
        103: 'iconfont icon-tijikongjian',
        101: 'iconfont icon-shangpin',
        102: 'iconfont icon-danju',
        145: 'iconfont icon-baobiao'
      },
      // 是否折叠菜单
      isCollapse: false,
      // 激活的链接地址
      activePath: ''
    }
  },
  created () {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login2')
    },
    async getMenuList () {
      const { data: res } = await this.$http.get('/api/menus')
      if (res.meta.status !== 207) {
        return this.$message.error(res.meta.msg)
      } else {
        this.menuList = res.data
      }
    },
    // 折叠菜单
    toggleCollapse () {
      this.isCollapse = !this.isCollapse
    },
    // 保存连接激活状态
    saveNavStatus (activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang='less' scoped>
.home_container {
  height: 100%;
}
.el-header {
  background-color: #323232;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: rgb(197, 197, 197);
  font-size: 22px;
}

.home_div {
  height: 100%;
  display: flex;
  align-items: center;
  span {
    margin-left: 15px;
  }
}

.home_logo {
  height: 100%;
}
.el-aside {
  background-color: #404040;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color: #eaedf1;
}
.iconfont {
  margin-right: 10px;
}
.toggle-button {
  background-color: #4a5058;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
